(Netter Basic Science) Frank H. Netter - Atlas of Human Anatomy-Elsevier (2018)

External Anal Sphincter Muscle: Perineal Views
See also Plates 360, 365
6
Male
Dartos fascia of scrotum
Septum of scrotum
Deep (Buck’s) fascia of penis
Bulbospongiosus muscle with deep perineal
(investing or Gallaudet’s) fascia removed
Ischiocavernosus muscle with deep perineal
(investing or Gallaudet’s) fascia removed
Perineal membrane
Perineal body
Superficial transverse perineal muscle with deep
perineal (investing or Gallaudet’s) fascia removed
Subcutaneous
Superficial
Deep
Parts* of external anal
sphincter muscle
Superficial perineal (Colles’) fascia (cut edges)
Transverse fibrous septum of ischioanal fossa (cut)
Ischial tuberosity
Sacrotuberous ligament
Pubococcygeus
Puboanalis (puborectalis) Levator ani muscle
Iliococcygeus
Anococcygeal body (ligament) (posterior extensions
of superficial external anal sphincter muscle)
Gluteus maximus muscle
Tip of coccyx
Superficial perineal (Colles’) fascia (cut edge)
Ischiocavernosus muscle with deep perineal
(investing or Gallaudet’s) fascia removed
Bulbospongiosus muscle with deep perineal
(investing or Gallaudet’s) fascia removed
Fibers from superficial external anal
sphincter muscle to ischiopubic ramus
Perineal membrane
Superficial transverse perineal muscle with
deep perineal (investing or Gallaudet’s)
fascia removed
Superficial perineal (Colles’) fascia (cut edge)
Perineal body
Crossed fibers from superficial and deep external
sphincters to superficial transverse perineal muscle
Parts* of external anal
Deep
sphincter muscle Superficial
Subcutaneous
Pubococcygeus
Levator ani muscle Puboanalis (puborectalis)
Iliococcygeus
Anococcygeal body (ligament) (posterior extensions
of superficial external anal sphincter muscle)
*Parts variable and often indistinct
Female
Clitoris
External urethral
orifice
Vagina
Ischiopubic
ramus
Anus
Rectum Plate 377
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